All four came up together. Grimaud continued to climb like a cat and succeeded at last in catching hold of a hook, which served to keep one of the shutters back when opened. Then resting his foot on a small ledge he made a sign to show all was right.

“Well?” asked D’Artagnan.

Grimaud showed his closed hand, with two fingers spread out.

“Speak,” said Athos; “we cannot see your signs. How many are there?”

“Two. One opposite to me, the other with his back to me.”

“Good. And the man opposite to you is — —

“The man I saw go in.”

“Do you know him?”